[BUG] Cleanup tfvars

[lechnerc77]

Is there an existing issue for this?

• [X] I have searched the existing issues

What type of issue are you facing

bug report

Describe the bug

• Add *.tfvars to .gitignore to follow best practices. Otherwise customers might by accidentally committed
• Adjust code of samples
• Adjust documentation of samples

Expected Behavior

n/a

Steps To Reproduce

n/a

Add screenshots to help explain your problem

n/a

Additional context

n/a